- Subject, if female 65 years of age or younger, must have a negative serum pregnancy test. Females of childbearing potential must be instructed to and agree to avoid pregnancy during the study and must use an acceptable method of birth control: An oral contraceptive, an intrauterine device (IUD), implantable contraceptive, transdermal or injectable contraceptive for at least 1 month prior to entering the study and will continue its use throughout the study and for thirty days following study participation; Barrier method of contraception, eg, condom and/or diaphragm with spermicide while participating in the study; Abstinence.